weathering and mass movement

Question 1

what is weathering

Answer 1

the breakdown of rocks by chemical or physical changes

Question 2

what is freeze thaw

Answer 2

water freezing and then thawing in a crack causes expansion of the rock, this creates pressure which causes the rock to disintegrate

Question 3

what is salt weathering

Answer 3

when the sea water evaporates salt is left behind to crystallise in the rocks which creates pressure then causes the rocks to disintegrate

Question 4

what is carbonation

Answer 4

rain water is acidic. contact with alkali rocks like chalk/limestone creates a chemical reaction which causes the rocks to dissolve

Question 5

what does mass movement mean

Answer 5

the down slope of rock/soil/mud due to gravity

Question 6

what is a slide

Answer 6

occurs after rain when lose material becomes saturated and the weight causes it to become unstable and rapidly move downhill

Question 7

what is a rockfall

Answer 7

occur on bare rock surfaces that are well jointed and prone to freeze thaw weathering

Question 8

what is slumping

Answer 8

involves a whole segment of a cliff moving down slope along a saturated shear-plane or line of weakness